void OnGUI()
{
_colorType = (PackedColorType)EditorGUILayout.Popup("Packing type", (int)_colorType, _packingTypeNames);
_imgDitheringType = (DitheringType)EditorGUILayout.EnumPopup("Preprocess dithering", _imgDitheringType);
_gsDitheringType = (DitheringType)EditorGUILayout.EnumPopup("Grayscale dithering", _gsDitheringType);
_sources[0] = EditorGUILayout.ObjectField("Texture (R)", _sources[0], typeof(Texture2D), false) as Texture2D;
_sources[1] = EditorGUILayout.ObjectField("Texture (G)", _sources[1], typeof(Texture2D), false) as Texture2D;
_sources[2] = EditorGUILayout.ObjectField("Texture (B)", _sources[2], typeof(Texture2D), false) as Texture2D;
if (GUILayout.Button("Process"))
{
var res = Process(_sources, _colorType, _imgDitheringType, _gsDitheringType);
EditorUtility.DisplayDialog(Title, res ?? "Success", "Close");
}
}
public static string Process(string path, Texture2D[] sources, PackedColorType colorType,
DitheringType imgDitheringType, DitheringType gsDitheringType)
{
var width = -1;
var height = -1;
TextureImporter importer;
string gsName = null;
foreach (var source in sources)
{
if (source != null)
{
importer = AssetImporter.GetAtPath(AssetDatabase.GetAssetPath(source)) as TextureImporter;
if (importer == null || !importer.isReadable)
{
return("Source texture " + source.name + " should be readable");
}
if (width == -1)
{
width = source.width;
height = source.height;
}
if (source.width != width || source.height != height)
{
return("All textures should have same size");
}
if (gsName != null)
{
gsName += "_";
}
gsName += source.name;
}
}
if (width == -1)
{
return("One or more textures should be defined");
}
if (path == null)
{
path = EditorUtility.SaveFolderPanel(SelectFolderTitle, string.Empty, string.Empty);
}
if (string.IsNullOrEmpty(path))
{
return("Target path not defined");
}
// make folder path relative
if (path.IndexOf(Application.dataPath) == 0)
{
path = "Assets" + path.Substring(Application.dataPath.Length);
}
var gsData = new Color[width * height];
var tex = new Texture2D(width, height, TextureFormat.RGB24, false);
string fileName = null;
Color[] colData;
Color c;
float gs;
for (var channel = 0; channel < 3; channel++)
{
if (sources[channel] != null)
{
colData = sources[channel].GetPixels();
ProcessDithering(colData, width, height, imgDitheringType);
var invDataLength = 1 / (float)colData.Length;
for (int i = 0, iMax = colData.Length; i < iMax; i++)
{
if (i % 1000 == 0)
{
EditorUtility.DisplayProgressBar(Title,
string.Format("Processing {0}...", sources[channel].name),
i * invDataLength);
}
c = colData[i];
if (colorType == PackedColorType.YCoCg)
{
gs = 0.25f * c.r + 0.5f * c.g + 0.25f * c.b;
colData[i] = new Color(0.5f * c.r - 0.5f * c.b + 0.5f, -0.25f * c.r + 0.5f * c.g - 0.25f * c.b + 0.5f, 0f);
colData[i].b = 1.0f - colData[i].r;
}
else
{
// gs = 0.299f * c.r + 0.587f * c.g + 0.114f * c.b;
gs = 0.2126f * c.r + 0.7152f * c.g + 0.0722f * c.b;
colData[i] = new Color(-.168736f * c.r - .331264f * c.g + 0.5f * c.b + 0.5f,
0.5f * c.r - 0.418688f * c.g - 0.081312f * c.b + 0.5f, 0f);
// Without it dx9 will add 2 alu wtf??
colData[i].b = -0.2989548f * c.r + 0.412898048f * c.g - 0.113943232f * c.b + 0.5f;
}
gsData[i][channel] = gs;
}
EditorUtility.ClearProgressBar();
try {
fileName = AssetDatabase.GenerateUniqueAssetPath(
Path.Combine(path, string.Format("{0}.col.png", sources[channel].name)));
tex.SetPixels(colData);
File.WriteAllBytes(fileName, tex.EncodeToPNG());
} catch (Exception ex) {
DestroyImmediate(tex);
AssetDatabase.Refresh();
return(ex.Message);
}
}
}
ProcessDithering(gsData, width, height, gsDitheringType);
try {
fileName = AssetDatabase.GenerateUniqueAssetPath(Path.Combine(path, string.Format("{0}.gs.png", gsName)));
tex.SetPixels(gsData);
File.WriteAllBytes(fileName, tex.EncodeToPNG());
DestroyImmediate(tex);
} catch (Exception ex) {
DestroyImmediate(tex);
AssetDatabase.Refresh();
return(ex.Message);
}
AssetDatabase.Refresh();
return(null);
}
public static string Process(Texture2D[] sources, PackedColorType colorType,
DitheringType imgDitheringType, DitheringType gsDitheringType)
{
return(Process(null, sources, colorType, imgDitheringType, gsDitheringType));
}
